Process for producing fast tints on animal fibers.



UNITED srarns PATENT orrucng GADIENT EN GI, ARMIN GROB, AND FRITZ STRAUB, OF BASED, SWITZERLAND, ASSIGNORS TO SOCIETY OF CHEMICAL INDUSTRY IN BASLE, OF BASEL, SWITZERLAND.

PROCESS FOR PRODUCING FAST TINTS ON ANIMAL FIBERS.

1,227,406. No Drawing;

all saturated by chromium, as the chromium compounds of azo dyestuffs for instance obtained by digesting the corresponding azo dyestuffs with chromium oxid or its salts in aqueous solutions until the transformation is complete, or according to the process of the applications for Letters Patent Ser. No.- 64023, filed November 29, 1915, and Ser. No. 112950, filed August 3, 1916, by combining chromium compounds of orthooxydiazo bodies with any component usually combined with diazo bodies for the manufacture of azo dyestuffs and treating subsequently the thus obtained half chromated orthooxyazo dyestuffs with chromium salts while in a heated condition, are eminently fit for dyeing animal fibers in an acid bath. Thereupon tints are obtained which are generally analogous to but without exception more nearly pure than those obtained b chromating subsequently the azo dyestu s used as parent materials for the preparation of the chromium compounds. In many cases, essentially other and indeed more desirable, namely purer tints are obtained than those hitherto obtained by chromating subsequently the parent materials. Finall the chromium compounds of the dyestu s which when applied as sodium salts were destroyed by the subsequent chromating, give according to the present process beautiful and fast dyeings. The fastness to light of the dyeings obtained according to the present invention with the I Specification of Letters Patent.

is equal to that of subsequently chromated Patented May 22, 1917.

Application filed November 27, 1915. Serial No. 63,827.

chromium compounds of the specified azo dyestuffs is a very prominent one and is without exception superior to that of .the dyeings obtained by subsequent chromating; In some cases, it is even increased extraordinarily. The fastness to alkali and to washing of the obtained dyeings is very good and the fastness tolfulling and to potting is sufficient for the most practical uses. In many cases the fastness to fulling and to potting dyeings. By the'present process it becomes consequently possible to produce dyeings prominently fast to light and sufliciently fast to fulling and to potting for the most practical purposes, without any subsequent treatment, whereby the shading with other dyestuf'f classes and the obtaining of predetermined, prescribed final shades are essentially facilitated. Likewise this new process yields wools which are more open and more able to be fulled, as the noxious action of a long boiling in the chromate bath on the materlal falls away. Moreover copper vats may be used, since the tints of the chromium compounds are not sensitive or only very 70 slightly sensitive to copper.

The new rocess shows therefore a considerable tec nical progress in several respects. The prominent fitness of the characterized chromium compounds for the production of fast dyeings on animal fibers became known only by the presentinvention.

Their use for the specified purpose is illustrated by the following example:

The goods are dyed with 13% dyestufi' 0 (chromium compound) 10% crystallized sodium sulfate, 35% acetic acid, of the specific gravity of 1.0523 (01' the equivalent quantlty of formic acid or of sulfuric acid),

the goods being introduced into the bath at 85- 50 to 60 C., the bath slowly heated to boilg and the goods dyed in the boiling bath for g of an hour to 1 hour.

The following'tabular exhibit illustrates the use of a, certain-number of chromium compounds apcording to the present process:

I h u v Dyemgs oft esodm'm Salt Dyeings of the chromium compound from an acid Di'azo derivate of- Combined with- Fromanacid bath. Subsequently chromated. bath OH 1:8-Aminonaghthol-3fi-di- Red-violet Green Green little and sulfonic aci purer than 2).

NHQ

. 1:8-Amin0naphthol-2z4-di- Violet. Blue-gi-eennl Green.

sulfonicacid. v

m-Pienylendiamin-sulfonic BrowIi-orange Brown w phtholsulfonie acid... Dullviolet-brown Black-brown Bl rown.

Orthogmiaoxylatedbenzoyl- Black-brown Olive-green -gr acetic acid.

on Beta-naphthol Red-brbwn Dull-violet Vi let (p rer an blue! than 2). W

3-Oxy-1-thi0naphthene Orange Gray (mostlydestroyed).. -black- Dieetohydroinden Orange Red-br'own IOW H 2 5' i o aphthol-7-sul- Red-brown Violet Violet.

| ionic acid. I

OaH

' m-Pheny1endiamin.......... Red-browr Yellow-brown l ww CI H Oxythionaphthene Orange-brown .5. Gray,(destroyed). Blacklue. NH -$0311 on Orthoearbgxylatedbenzoyl- Brown-olive Olive-black Olive.

I, acetic acid. v NH2 Ne D the 6 v yeings of sdlum salt Dye-lugs of the Ohm} mum; comgound from Diazo derivate of Combinod with- Fromanaeid bath. Subsequentlychromated. mama bat OH 1:8-Aminonaphthol-2:4-di- Blue-black Yellowish green Yellowish green.

I sulfonic 801d- NO \NH 1:8-Aminonaphthol-4sulfo- Black-violet Yellowish green Yellowish g ee nic acid.

Paralaesolsulfonic acid Yellow-brown Brown Brown.

" Orthocarboxylated benzoyl- Brown. o -o e (p y e- -o ve:

acetic acid. strayed).

0H lz8-Dioxynaphthaleno-3:6- Bordeaux-red. B1116 e- 'SulfOm'c acid. NH,

" Orthocarboxylatdbenzoyl- Dull bordeaux Destroyedl Pure yellowish e aeetic acid.

1 Betanaphthol Redm. Bordea xulunln. Bordeaux. 000367113 g.

1:8-Am1'non2tfhthol-3fi-di- Reddish-violet Blue-black Reddish-blue.

sultonic aci 1:8-I I;phthyIaminsulfonic Red Yellow-brown Red-brown. ac:

1:8-Aminona hthol-2:4-di- Violet Blue-violet Greem' h-blue.

sulfom'c aci V Resorcinol Yellow-brown Red-brown Pure red-brown.

Beta-oxynaphthoicacid..... Brown-red Corinth Corinth.

OH Acetacetic anilid Pure-yellow Lemon-yellow Lemon-yellow. COOHl !NH Perinaphthindandione e f J Dy ingso the s odlumsalt y g of the 4 mium com ound from Diazo derivate oi Combined with- From an acid bath. Subsequently chromated. ha

"7 0H 1:8-Aminona hthol-3:6-di- Blue-violet Dull-green Pure-green-blue.

suliom'e acl coon K/ N11 $1 Dyeings oi the sodium salt.

Dyeings of the chromium compound. Diazo derivate of- Combined. with- From an acid bath. Subsequently chromated.

OH 1:8-Aminonaphtho1-2Mdi- Red-violet Blue .Q Vivid-blue.

sulionic acid. coon-l NH,

" 2 :5 Aminonaphthol 7 Re 1. Red-violet Blue-red.

sulfonic acid.

" 1:4-Naphtho1su1fonic em" Red Violet Violet.

1-Pheny1-3-methy1-5-pyrazo- Orangeyellow Reddish-orange Roddish-orange.

loneslflfpnie and. Q

NH, Nitr0-1-pheny1-3-methy l- Red-brown Bluish-red.... Bluish pure ma (much I 5-pymzolono. purer than 2).

AlphanaphthoL, Black-violet. Blue-blank. gf (purer. than Betanaphthol Violet-bordeaux Blue Pure blue"(much purer than 2).

Resorcinol..'... Bed-brown; Gray-violet Violet:

3-Oxy-1-thionapmaheneL..... Dull-blue red lartlydestroyed Greenish-blue. v

Diketohydroindeno Red-brown Destroyed 'Irung.

Dark-brown Dark-brqwn.

Red-biown Dyeings ofthe sodium salt. y g of the chromium The following body- Combined with- From an acid bath. Subsequently chromated. compound lmolecule 1 molecule lz8z4z6-aminonaph- Blue-green Green Yellow-green.

thol-disulionic acid and 1 N=N molecule l OH k/ N0 1 N=N- OH 2molecu1esbetanephtho1 Black-brown Black Blue-black. nan #41:;-

(5 2 molecules 2:6-naphtholsu1- violet-blacknn Black Blue-black. ionic acid.

lmolecule Violet... Black-green Black-green.

and 1 molecule resorcinol.

What we claim is: 1915, in the presence of two subscribing 10 The described process for producing fast witnesses. I ih f sfile in Z11 iiifi bilf i fih firi niliii GADIENT DR. ARMIN GROB.

5 compounds of azo dyestuffs containing FRITZ STRAUB groups able to combine with chromium and which have been combined with chromium. v Witnesses:

In witness whereof we have hereunto ARNOLD ZUBER, signed our names this 30th day of: October, AMAND BITTER. 

